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ast.c
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ast.c
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/*
AST
interface to front-end, obtains and translates syntax trees
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#ifdef _OS_WINDOWS_
#include <malloc.h>
#endif
#include "julia.h"
#include "julia_internal.h"
#include "flisp.h"
#ifdef __cplusplus
extern "C" {
#endif
// MSVC complains about "julia_flisp.boot.inc : error C4335: Mac file format
// detected: please convert the source file to either DOS or UNIX format"
#ifdef _MSC_VER
#pragma warning(disable:4335)
#endif
static uint8_t flisp_system_image[] = {
#include "julia_flisp.boot.inc"
};
static fltype_t *jvtype=NULL;
static value_t true_sym;
static value_t false_sym;
static value_t fl_error_sym;
static value_t fl_null_sym;
static value_t fl_jlgensym_sym;
static jl_value_t *scm_to_julia(value_t e, int expronly);
static value_t julia_to_scm(jl_value_t *v);
value_t fl_defined_julia_global(value_t *args, uint32_t nargs)
{
// tells whether a var is defined in and *by* the current module
argcount("defined-julia-global", nargs, 1);
(void)tosymbol(args[0], "defined-julia-global");
if (jl_current_module == NULL)
return FL_F;
jl_sym_t *var = jl_symbol(symbol_name(args[0]));
jl_binding_t *b =
(jl_binding_t*)ptrhash_get(&jl_current_module->bindings, var);
return (b != HT_NOTFOUND && b->owner==jl_current_module) ? FL_T : FL_F;
}
value_t fl_current_julia_module(value_t *args, uint32_t nargs)
{
value_t opaque = cvalue(jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = (jl_value_t*)jl_current_module;
return opaque;
}
value_t fl_invoke_julia_macro(value_t *args, uint32_t nargs)
{
if (nargs < 1)
argcount("invoke-julia-macro", nargs, 1);
jl_function_t *f = NULL;
jl_value_t **margs;
JL_GC_PUSHARGS(margs, nargs);
int i;
for(i=0; i < nargs; i++) margs[i] = NULL;
for(i=1; i < nargs; i++) margs[i] = scm_to_julia(args[i], 1);
jl_value_t *result = NULL;
JL_TRY {
margs[0] = scm_to_julia(args[0], 1);
f = (jl_function_t*)jl_toplevel_eval(margs[0]);
assert(jl_is_func(f));
result = jl_apply(f, &margs[1], nargs-1);
}
JL_CATCH {
JL_GC_POP();
value_t opaque = cvalue(jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = jl_exception_in_transit;
return fl_list2(fl_error_sym, opaque);
}
// protect result from GC, otherwise it could be freed during future
// macro expansions, since it will be referenced only from scheme and
// not julia.
// all calls to invoke-julia-macro happen under a single call to jl_expand,
// so the preserved value stack is popped there.
assert(result != NULL);
jl_gc_preserve(result);
value_t scm = julia_to_scm(result);
fl_gc_handle(&scm);
value_t scmresult;
jl_module_t *defmod = f->linfo->module;
if (defmod == jl_current_module) {
scmresult = fl_cons(scm, FL_F);
}
else {
value_t opaque = cvalue(jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = (jl_value_t*)defmod;
scmresult = fl_cons(scm, opaque);
}
fl_free_gc_handles(1);
JL_GC_POP();
return scmresult;
}
static builtinspec_t julia_flisp_ast_ext[] = {
{ "defined-julia-global", fl_defined_julia_global },
{ "invoke-julia-macro", fl_invoke_julia_macro },
{ "current-julia-module", fl_current_julia_module },
{ NULL, NULL }
};
extern int jl_parse_depwarn(int warn);
void jl_init_frontend(void)
{
fl_init(4*1024*1024);
if (fl_load_system_image_str((char*)flisp_system_image,
sizeof(flisp_system_image))) {
jl_error("fatal error loading system image\n");
}
fl_applyn(0, symbol_value(symbol("__init_globals")));
jvtype = define_opaque_type(symbol("julia_value"), sizeof(void*),
NULL, NULL);
assign_global_builtins(julia_flisp_ast_ext);
true_sym = symbol("true");
false_sym = symbol("false");
fl_error_sym = symbol("error");
fl_null_sym = symbol("null");
fl_jlgensym_sym = symbol("jlgensym");
// Enable / disable syntax deprecation warnings
jl_parse_depwarn((int)jl_options.depwarn);
}
DLLEXPORT void jl_lisp_prompt(void)
{
if (jvtype==NULL) jl_init_frontend();
fl_applyn(1, symbol_value(symbol("__start")), fl_cons(FL_NIL,FL_NIL));
}
static jl_sym_t *scmsym_to_julia(value_t s)
{
assert(issymbol(s));
if (fl_isgensym(s)) {
static char gsname[16];
char *n = uint2str(&gsname[1], sizeof(gsname)-1,
((gensym_t*)ptr(s))->id, 10);
*(--n) = '#';
return jl_symbol(n);
}
return jl_symbol(symbol_name(s));
}
static jl_value_t *scm_to_julia_(value_t e, int expronly);
static jl_value_t *full_list(value_t e, int expronly)
{
size_t ln = llength(e);
if (ln == 0) return jl_an_empty_cell;
jl_array_t *ar = jl_alloc_cell_1d(ln);
size_t i=0;
while (iscons(e)) {
jl_cellset(ar, i, scm_to_julia_(car_(e), expronly));
e = cdr_(e);
i++;
}
return (jl_value_t*)ar;
}
static jl_value_t *full_list_of_lists(value_t e, int expronly)
{
size_t ln = llength(e);
if (ln == 0) return jl_an_empty_cell;
jl_array_t *ar = jl_alloc_cell_1d(ln);
size_t i=0;
while (iscons(e)) {
jl_cellset(ar, i, full_list(car_(e),expronly));
e = cdr_(e);
i++;
}
return (jl_value_t*)ar;
}
static jl_value_t *scm_to_julia(value_t e, int expronly)
{
#ifdef JL_GC_MARKSWEEP
int en = jl_gc_is_enabled();
jl_gc_disable();
#endif
jl_value_t *v;
JL_TRY {
v = scm_to_julia_(e, expronly);
}
JL_CATCH {
// if expression cannot be converted, replace with error expr
jl_expr_t *ex = jl_exprn(error_sym, 1);
jl_cellset(ex->args, 0, jl_cstr_to_string("invalid AST"));
v = (jl_value_t*)ex;
}
#ifdef JL_GC_MARKSWEEP
if (en) jl_gc_enable();
#endif
return v;
}
extern int64_t conv_to_int64(void *data, numerictype_t tag);
static jl_value_t *scm_to_julia_(value_t e, int eo)
{
if (fl_isnumber(e)) {
int64_t i64;
if (isfixnum(e)) {
i64 = numval(e);
}
else {
assert(iscprim(e));
cprim_t *cp = (cprim_t*)ptr(e);
numerictype_t nt = cp_numtype(cp);
switch (nt) {
case T_DOUBLE:
return (jl_value_t*)jl_box_float64(*(double*)cp_data(cp));
case T_FLOAT:
return (jl_value_t*)jl_box_float32(*(float*)cp_data(cp));
case T_UINT8:
return (jl_value_t*)jl_box_uint8(*(uint8_t*)cp_data(cp));
case T_UINT16:
return (jl_value_t*)jl_box_uint16(*(uint16_t*)cp_data(cp));
case T_UINT32:
return (jl_value_t*)jl_box_uint32(*(uint32_t*)cp_data(cp));
case T_UINT64:
return (jl_value_t*)jl_box_uint64(*(uint64_t*)cp_data(cp));
default:
;
}
i64 = conv_to_int64(cp_data(cp), nt);
}
if (
#ifdef _P64
jl_options.int_literals==32
#else
jl_options.int_literals!=64
#endif
) {
if (i64 > (int64_t)S32_MAX || i64 < (int64_t)S32_MIN)
return (jl_value_t*)jl_box_int64(i64);
return (jl_value_t*)jl_box_int32((int32_t)i64);
}
else {
return (jl_value_t*)jl_box_int64(i64);
}
}
if (issymbol(e)) {
if (e == true_sym)
return jl_true;
else if (e == false_sym)
return jl_false;
return (jl_value_t*)scmsym_to_julia(e);
}
if (fl_isstring(e)) {
return jl_pchar_to_string((char*)cvalue_data(e), cvalue_len(e));
}
if (e == FL_F) {
return jl_false;
}
if (e == FL_T) {
return jl_true;
}
if (e == FL_NIL) {
return (jl_value_t*)jl_null;
}
if (iscons(e)) {
value_t hd = car_(e);
if (hd == fl_jlgensym_sym) {
size_t genid = numval(car_(cdr_(e)));
return jl_box_gensym(genid);
}
if (hd == fl_null_sym && llength(e) == 1)
return jl_nothing;
if (issymbol(hd)) {
jl_sym_t *sym = scmsym_to_julia(hd);
/* tree node types:
goto gotoifnot label return
lambda call = quote
null top method
body file new
line enter leave
*/
size_t n = llength(e)-1;
size_t i;
if (sym == lambda_sym) {
jl_expr_t *ex = jl_exprn(lambda_sym, n);
e = cdr_(e);
value_t largs = car_(e);
jl_cellset(ex->args, 0, full_list(largs,eo));
e = cdr_(e);
value_t ee = car_(e);
jl_array_t *vinf = jl_alloc_cell_1d(4);
jl_cellset(vinf, 0, full_list(car_(ee),eo));
ee = cdr_(ee);
jl_cellset(vinf, 1, full_list_of_lists(car_(ee),eo));
ee = cdr_(ee);
jl_cellset(vinf, 2, full_list_of_lists(car_(ee),eo));
ee = cdr_(ee);
jl_cellset(vinf, 3, isfixnum(car_(ee)) ?
jl_box_long(numval(car_(ee))) :
full_list(car_(ee),eo));
assert(!iscons(cdr_(ee)));
jl_cellset(ex->args, 1, vinf);
e = cdr_(e);
for(i=2; i < n; i++) {
assert(iscons(e));
jl_cellset(ex->args, i, scm_to_julia_(car_(e), eo));
e = cdr_(e);
}
return
(jl_value_t*)jl_new_lambda_info((jl_value_t*)ex, jl_null);
}
e = cdr_(e);
if (!eo) {
if (sym == line_sym && n==1) {
return jl_new_struct(jl_linenumbernode_type,
scm_to_julia_(car_(e),0));
}
if (sym == label_sym) {
return jl_new_struct(jl_labelnode_type,
scm_to_julia_(car_(e),0));
}
if (sym == goto_sym) {
return jl_new_struct(jl_gotonode_type,
scm_to_julia_(car_(e),0));
}
if (sym == inert_sym || (sym == quote_sym && (!iscons(car_(e))))) {
return jl_new_struct(jl_quotenode_type,
scm_to_julia_(car_(e),0));
}
if (sym == top_sym) {
return jl_new_struct(jl_topnode_type,
scm_to_julia_(car_(e),0));
}
if (sym == newvar_sym) {
return jl_new_struct(jl_newvarnode_type,
scm_to_julia_(car_(e),0));
}
}
else if (sym == inert_sym && !iscons(car_(e))) {
sym = quote_sym;
}
jl_expr_t *ex = jl_exprn(sym, n);
// allocate a fresh args array for empty exprs passed to macros
if (eo && n == 0)
ex->args = jl_alloc_cell_1d(0);
for(i=0; i < n; i++) {
assert(iscons(e));
jl_cellset(ex->args, i, scm_to_julia_(car_(e),eo));
e = cdr_(e);
}
return (jl_value_t*)ex;
}
else {
jl_error("malformed tree");
}
}
if (iscprim(e) && cp_class((cprim_t*)ptr(e))==wchartype) {
jl_value_t *wc =
jl_box32(jl_char_type, *(int32_t*)cp_data((cprim_t*)ptr(e)));
return wc;
}
if (iscvalue(e) && cv_class((cvalue_t*)ptr(e)) == jvtype) {
return *(jl_value_t**)cv_data((cvalue_t*)ptr(e));
}
jl_error("malformed tree");
return (jl_value_t*)jl_null;
}
static value_t julia_to_scm_(jl_value_t *v);
static arraylist_t jlgensym_to_flisp;
static value_t julia_to_scm(jl_value_t *v)
{
value_t temp;
if (jlgensym_to_flisp.len)
jlgensym_to_flisp.len = 0; // in case we didn't free it last time we got here (for example, if we threw an error)
else
arraylist_new(&jlgensym_to_flisp, 0);
// need try/catch to reset GC handle stack in case of error
FL_TRY_EXTERN {
temp = julia_to_scm_(v);
}
FL_CATCH_EXTERN {
temp = fl_list2(fl_error_sym, cvalue_static_cstring("expression too large"));
}
arraylist_free(&jlgensym_to_flisp);
return temp;
}
static void array_to_list(jl_array_t *a, value_t *pv)
{
if (jl_array_len(a) > 300000)
lerror(OutOfMemoryError, "expression too large");
value_t temp;
for(long i=jl_array_len(a)-1; i >= 0; i--) {
*pv = fl_cons(FL_NIL, *pv);
temp = julia_to_scm_(jl_cellref(a,i));
// note: must be separate statement
car_(*pv) = temp;
}
}
static value_t julia_to_list2(jl_value_t *a, jl_value_t *b)
{
value_t sa = julia_to_scm_(a);
fl_gc_handle(&sa);
value_t sb = julia_to_scm_(b);
value_t l = fl_list2(sa, sb);
fl_free_gc_handles(1);
return l;
}
static value_t julia_to_scm_(jl_value_t *v)
{
if (jl_is_symbol(v)) {
return symbol(((jl_sym_t*)v)->name);
}
if (jl_is_gensym(v)) {
size_t idx = ((jl_gensym_t*)v)->id;
size_t i;
for (i = 0; i < jlgensym_to_flisp.len; i+=2) {
if ((ssize_t)jlgensym_to_flisp.items[i] == idx)
return fl_list2(fl_jlgensym_sym, fixnum((size_t)jlgensym_to_flisp.items[i+1]));
}
arraylist_push(&jlgensym_to_flisp, (void*)idx);
value_t flv = fl_applyn(0, symbol_value(symbol("make-jlgensym")));
assert(iscons(flv) && car_(flv) == fl_jlgensym_sym);
arraylist_push(&jlgensym_to_flisp, (void*)(size_t)numval(car_(cdr_(flv))));
return flv;
}
if (v == jl_true) {
return FL_T;
}
if (v == jl_false) {
return FL_F;
}
if (v == jl_nothing) {
return fl_cons(fl_null_sym, FL_NIL);
}
if (jl_is_expr(v)) {
jl_expr_t *ex = (jl_expr_t*)v;
value_t args = FL_NIL;
fl_gc_handle(&args);
array_to_list(ex->args, &args);
value_t hd = julia_to_scm_((jl_value_t*)ex->head);
value_t scmv = fl_cons(hd, args);
fl_free_gc_handles(1);
return scmv;
}
if (jl_typeis(v, jl_linenumbernode_type)) {
return julia_to_list2((jl_value_t*)line_sym, jl_fieldref(v,0));
}
if (jl_typeis(v, jl_labelnode_type)) {
return julia_to_list2((jl_value_t*)label_sym, jl_fieldref(v,0));
}
if (jl_typeis(v, jl_gotonode_type)) {
return julia_to_list2((jl_value_t*)goto_sym, jl_fieldref(v,0));
}
if (jl_typeis(v, jl_quotenode_type)) {
return julia_to_list2((jl_value_t*)inert_sym, jl_fieldref(v,0));
}
if (jl_typeis(v, jl_newvarnode_type)) {
return julia_to_list2((jl_value_t*)newvar_sym, jl_fieldref(v,0));
}
if (jl_typeis(v, jl_topnode_type)) {
return julia_to_list2((jl_value_t*)top_sym, jl_fieldref(v,0));
}
if (jl_is_long(v) && fits_fixnum(jl_unbox_long(v))) {
return fixnum(jl_unbox_long(v));
}
value_t opaque = cvalue(jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = v;
return opaque;
}
// this is used to parse a line of repl input
DLLEXPORT jl_value_t *jl_parse_input_line(const char *str)
{
value_t s = cvalue_static_cstring(str);
value_t e = fl_applyn(1, symbol_value(symbol("jl-parse-string")), s);
if (e == FL_EOF)
return jl_nothing;
return scm_to_julia(e,0);
}
// this is for parsing one expression out of a string, keeping track of
// the current position.
DLLEXPORT jl_value_t *jl_parse_string(const char *str, int pos0, int greedy)
{
value_t s = cvalue_static_cstring(str);
value_t p = fl_applyn(3, symbol_value(symbol("jl-parse-one-string")),
s, fixnum(pos0), greedy?FL_T:FL_F);
jl_value_t *expr=NULL, *pos1=NULL;
JL_GC_PUSH2(&expr, &pos1);
value_t e = car_(p);
if (e == FL_EOF) {
expr = (jl_value_t*)jl_null;
}
else {
expr = scm_to_julia(e,0);
}
pos1 = jl_box_long(tosize(cdr_(p),"parse"));
jl_value_t *result = (jl_value_t*)jl_tuple2(expr, pos1);
JL_GC_POP();
return result;
}
int jl_start_parsing_file(const char *fname)
{
value_t s = cvalue_static_cstring(fname);
if (fl_applyn(1, symbol_value(symbol("jl-parse-file")), s) == FL_F)
return 1;
return 0;
}
void jl_stop_parsing(void)
{
fl_applyn(0, symbol_value(symbol("jl-parser-close-stream")));
}
DLLEXPORT int jl_parse_depwarn(int warn)
{
value_t prev = fl_applyn(1, symbol_value(symbol("jl-parser-depwarn")), warn? FL_T : FL_F);
return prev == FL_T ? 1 : 0;
}
extern int jl_lineno;
jl_value_t *jl_parse_next(void)
{
value_t c = fl_applyn(0, symbol_value(symbol("jl-parser-next")));
if (c == FL_EOF)
return NULL;
if (iscons(c)) {
if (cdr_(c) == FL_EOF)
return NULL;
value_t a = car_(c);
if (isfixnum(a)) {
jl_lineno = numval(a);
//jl_printf(JL_STDERR, " on line %d\n", jl_lineno);
c = cdr_(c);
}
}
// for error, get most recent line number
if (iscons(c) && car_(c) == fl_error_sym)
jl_lineno = numval(fl_applyn(0, symbol_value(symbol("jl-parser-current-lineno"))));
return scm_to_julia(c,0);
}
jl_value_t *jl_load_file_string(const char *text, char *filename)
{
value_t t, f;
t = cvalue_static_cstring(text);
fl_gc_handle(&t);
f = cvalue_static_cstring(filename);
fl_applyn(2, symbol_value(symbol("jl-parse-string-stream")),
t, f);
fl_free_gc_handles(1);
return jl_parse_eval_all(filename);
}
// returns either an expression or a thunk
jl_value_t *jl_expand(jl_value_t *expr)
{
int np = jl_gc_n_preserved_values();
value_t arg = julia_to_scm(expr);
value_t e = fl_applyn(1, symbol_value(symbol("jl-expand-to-thunk")), arg);
jl_value_t *result = scm_to_julia(e,0);
while (jl_gc_n_preserved_values() > np) {
jl_gc_unpreserve();
}
return result;
}
DLLEXPORT jl_value_t *jl_macroexpand(jl_value_t *expr)
{
int np = jl_gc_n_preserved_values();
value_t arg = julia_to_scm(expr);
value_t e = fl_applyn(1, symbol_value(symbol("jl-macroexpand")), arg);
jl_value_t *result;
result = scm_to_julia(e,0);
while (jl_gc_n_preserved_values() > np) {
jl_gc_unpreserve();
}
return result;
}
ssize_t jl_max_jlgensym_in(jl_value_t *v)
{
ssize_t genid = -1;
if (jl_is_gensym(v)) {
genid = ((jl_gensym_t*)v)->id;
} else if (jl_is_expr(v)) {
jl_expr_t *e = (jl_expr_t*)v;
size_t i, l = jl_array_len(e->args);
for (i = 0; i < l; i++) {
ssize_t maxid = jl_max_jlgensym_in(jl_exprarg(e, i));
if (maxid > genid)
genid = maxid;
}
}
return genid;
}
// wrap expr in a thunk AST
jl_lambda_info_t *jl_wrap_expr(jl_value_t *expr)
{
// `(lambda () (() () () ()) ,expr)
jl_expr_t *le=NULL, *bo=NULL; jl_value_t *vi=NULL;
jl_value_t *mt = jl_an_empty_cell;
JL_GC_PUSH3(&le, &vi, &bo);
le = jl_exprn(lambda_sym, 3);
jl_cellset(le->args, 0, mt);
vi = (jl_value_t*)jl_alloc_cell_1d(4);
jl_cellset(vi, 0, mt);
jl_cellset(vi, 1, mt);
jl_cellset(vi, 2, mt);
jl_cellset(vi, 3, jl_box_long(jl_max_jlgensym_in(expr)+1));
jl_cellset(le->args, 1, vi);
if (!jl_is_expr(expr) || ((jl_expr_t*)expr)->head != body_sym) {
bo = jl_exprn(body_sym, 1);
jl_cellset(bo->args, 0, (jl_value_t*)jl_exprn(return_sym, 1));
jl_cellset(((jl_expr_t*)jl_exprarg(bo,0))->args, 0, expr);
expr = (jl_value_t*)bo;
}
jl_cellset(le->args, 2, expr);
jl_lambda_info_t *li = jl_new_lambda_info((jl_value_t*)le, jl_null);
JL_GC_POP();
return li;
}
// syntax tree accessors
// get array of formal argument expressions
jl_array_t *jl_lam_args(jl_expr_t *l)
{
assert(jl_is_expr(l));
assert(l->head == lambda_sym);
jl_value_t *ae = jl_exprarg(l,0);
assert(jl_is_array(ae));
return (jl_array_t*)ae;
}
jl_sym_t *jl_lam_argname(jl_lambda_info_t *li, int i)
{
jl_expr_t *ast;
if (jl_is_expr(li->ast))
ast = (jl_expr_t*)li->ast;
else
ast = (jl_expr_t*)jl_uncompress_ast(li, li->ast);
// NOTE (gc root): `ast` is not rooted here, but jl_lam_args and jl_cellref
// do not allocate.
return (jl_sym_t*)jl_cellref(jl_lam_args(ast),i);
}
// get array of local var symbols
jl_array_t *jl_lam_locals(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *le = jl_exprarg(l, 1);
assert(jl_is_array(le));
jl_value_t *ll = jl_cellref(le, 0);
assert(jl_is_array(ll));
return (jl_array_t*)ll;
}
// get array of var info records
jl_array_t *jl_lam_vinfo(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *le = jl_exprarg(l, 1);
assert(jl_is_array(le));
jl_value_t *ll = jl_cellref(le, 1);
assert(jl_is_array(ll));
return (jl_array_t*)ll;
}
// get array of var info records for captured vars
jl_array_t *jl_lam_capt(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *le = jl_exprarg(l, 1);
assert(jl_is_array(le));
jl_value_t *ll = jl_cellref(le, 2);
assert(jl_is_array(ll));
return (jl_array_t*)ll;
}
// get array of types for GenSym vars, or it's length (if not type-inferred)
jl_value_t *jl_lam_gensyms(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *le = jl_exprarg(l, 1);
assert(jl_is_array(le));
assert(jl_array_len(le) == 4);
return jl_cellref(le, 3);
}
int jl_lam_vars_captured(jl_expr_t *ast)
{
jl_array_t *vinfos = jl_lam_vinfo(ast);
for(int i=0; i < jl_array_len(vinfos); i++) {
if (jl_vinfo_capt((jl_array_t*)jl_cellref(vinfos,i))) {
return 1;
}
}
return 0;
}
// get array of body forms
jl_expr_t *jl_lam_body(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *be = jl_exprarg(l, 2);
assert(jl_is_expr(be));
assert(((jl_expr_t*)be)->head == body_sym);
return (jl_expr_t*)be;
}
jl_sym_t *jl_decl_var(jl_value_t *ex)
{
if (jl_is_symbol(ex)) return (jl_sym_t*)ex;
assert(jl_is_expr(ex));
return (jl_sym_t*)jl_exprarg(ex, 0);
}
int jl_is_rest_arg(jl_value_t *ex)
{
if (!jl_is_expr(ex)) return 0;
if (((jl_expr_t*)ex)->head != colons_sym) return 0;
jl_expr_t *atype = (jl_expr_t*)jl_exprarg(ex,1);
if (!jl_is_expr(atype)) return 0;
if (atype->head != call_sym || jl_array_len(atype->args) != 3)
return 0;
if ((jl_sym_t*)jl_exprarg(atype,1) != dots_sym)
return 0;
return 1;
}
static jl_value_t *copy_ast(jl_value_t *expr, jl_tuple_t *sp, int do_sp)
{
if (jl_is_symbol(expr)) {
if (!do_sp) return expr;
// pre-evaluate certain static parameters to help type inference
for(int i=0; i < jl_tuple_len(sp); i+=2) {
assert(jl_is_typevar(jl_tupleref(sp,i)));
if ((jl_sym_t*)expr == ((jl_tvar_t*)jl_tupleref(sp,i))->name) {
jl_value_t *spval = jl_tupleref(sp,i+1);
if (jl_is_long(spval))
return spval;
}
}
}
else if (jl_is_lambda_info(expr)) {
jl_lambda_info_t *li = (jl_lambda_info_t*)expr;
/*
if (sp == jl_null && li->ast &&
jl_array_len(jl_lam_capt((jl_expr_t*)li->ast)) == 0)
return expr;
*/
// TODO: avoid if above condition is true and decls have already
// been evaluated.
JL_GC_PUSH1(&li);
li = jl_add_static_parameters(li, sp);
// inner lambda does not need the "def" link. it leads to excess object
// retention, for example pointing to the original uncompressed AST
// of a top-level thunk that gets type inferred.
li->def = li;
li->ast = jl_prepare_ast(li, li->sparams);
gc_wb(li, li->ast);
JL_GC_POP();
return (jl_value_t*)li;
}
else if (jl_typeis(expr,jl_array_any_type)) {
jl_array_t *a = (jl_array_t*)expr;
jl_array_t *na = jl_alloc_cell_1d(jl_array_len(a));
JL_GC_PUSH1(&na);
size_t i;
for(i=0; i < jl_array_len(a); i++)
jl_cellset(na, i, copy_ast(jl_cellref(a,i), sp, do_sp));
JL_GC_POP();
return (jl_value_t*)na;
}
else if (jl_is_expr(expr)) {
jl_expr_t *e = (jl_expr_t*)expr;
jl_expr_t *ne = jl_exprn(e->head, jl_array_len(e->args));
JL_GC_PUSH1(&ne);
if (e->head == lambda_sym) {
jl_exprargset(ne, 0, copy_ast(jl_exprarg(e,0), sp, 0));
jl_exprargset(ne, 1, copy_ast(jl_exprarg(e,1), sp, 0));
jl_exprargset(ne, 2, copy_ast(jl_exprarg(e,2), sp, 1));
}
else if (e->head == assign_sym) {
jl_exprargset(ne, 0, copy_ast(jl_exprarg(e,0), sp, 0));
jl_exprargset(ne, 1, copy_ast(jl_exprarg(e,1), sp, 1));
}
else {
for(size_t i=0; i < jl_array_len(e->args); i++) {
jl_exprargset(ne, i, copy_ast(jl_exprarg(e,i), sp, 1));
}
}
JL_GC_POP();
return (jl_value_t*)ne;
}
return expr;
}
DLLEXPORT jl_value_t *jl_copy_ast(jl_value_t *expr)
{
if (expr == NULL) {
return NULL;
}
else if (jl_is_expr(expr)) {
jl_expr_t *e = (jl_expr_t*)expr;
size_t i, l = jl_array_len(e->args);
jl_expr_t *ne = NULL;
JL_GC_PUSH2(&ne, &expr);
ne = jl_exprn(e->head, l);
if (l == 0) {
ne->args = jl_alloc_cell_1d(0);
gc_wb(ne, ne->args);
}
else {
for(i=0; i < l; i++) {
jl_exprargset(ne, i, jl_copy_ast(jl_exprarg(e,i)));
}
}
JL_GC_POP();
return (jl_value_t*)ne;
}
else if (jl_typeis(expr,jl_array_any_type)) {
jl_array_t *a = (jl_array_t*)expr;
size_t i, l = jl_array_len(a);
jl_array_t *na = NULL;
JL_GC_PUSH2(&na, &expr);
na = jl_alloc_cell_1d(l);
for(i=0; i < l; i++)
jl_cellset(na, i, jl_copy_ast(jl_cellref(a,i)));
JL_GC_POP();
return (jl_value_t*)na;
}
else if (jl_is_quotenode(expr)) {
jl_value_t *v = jl_fieldref(expr,0);
if (jl_is_symbol(v) || jl_is_gensym(v))
return expr;
jl_value_t *q = NULL;
JL_GC_PUSH2(&q, &v);
q = jl_copy_ast(v);
v = jl_new_struct(jl_quotenode_type, q);
JL_GC_POP();
return v;
}
return expr;
}
static jl_value_t *dont_copy_ast(jl_value_t *expr, jl_tuple_t *sp, int do_sp)
{
if (jl_is_symbol(expr) || jl_is_lambda_info(expr)) {
return copy_ast(expr, sp, do_sp);
}
else if (jl_is_expr(expr)) {
jl_expr_t *e = (jl_expr_t*)expr;
if (e->head == lambda_sym) {
jl_exprargset(e, 0, dont_copy_ast(jl_exprarg(e,0), sp, 0));
jl_exprargset(e, 1, dont_copy_ast(jl_exprarg(e,1), sp, 0));
jl_exprargset(e, 2, dont_copy_ast(jl_exprarg(e,2), sp, 1));
}
else if (e->head == assign_sym) {
jl_exprargset(e, 0, dont_copy_ast(jl_exprarg(e,0), sp, 0));
jl_exprargset(e, 1, dont_copy_ast(jl_exprarg(e,1), sp, 1));
}
else {
for(size_t i=0; i < jl_array_len(e->args); i++) {
jl_exprargset(e, i, dont_copy_ast(jl_exprarg(e,i), sp, 1));
}
}
return (jl_value_t*)e;
}
return expr;
}
// TODO: eval decl types for arguments of non-generic functions
static void eval_decl_types(jl_array_t *vi, jl_value_t *ast, jl_tuple_t *spenv)
{
size_t i, l = jl_array_len(vi);
for(i=0; i < l; i++) {
jl_array_t *v = (jl_array_t*)jl_cellref(vi, i);
assert(jl_array_len(v) > 1);
jl_value_t *ty = jl_static_eval(jl_cellref(v,1), NULL, jl_current_module,
(jl_value_t*)spenv, (jl_expr_t*)ast, 1, 1);
if (ty != NULL && (jl_is_type(ty) || jl_is_typevar(ty))) {
jl_cellset(v, 1, ty);
}
else {
jl_cellset(v, 1, (jl_value_t*)jl_any_type);
}
}
}
jl_tuple_t *jl_tuple_tvars_to_symbols(jl_tuple_t *t)
{
jl_tuple_t *s = jl_alloc_tuple_uninit(jl_tuple_len(t));
size_t i;
for(i=0; i < jl_tuple_len(s); i+=2) {
assert(jl_is_typevar(jl_tupleref(t,i)));
jl_tupleset(s, i,
(jl_value_t*)((jl_tvar_t*)jl_tupleref(t,i))->name);
jl_tupleset(s, i+1, jl_tupleref(t,i+1));
}
return s;
}
// given a new lambda_info with static parameter values, make a copy
// of the tree with declared types evaluated and static parameters passed
// on to all enclosed functions.
// this tree can then be further mutated by optimization passes.
DLLEXPORT
jl_value_t *jl_prepare_ast(jl_lambda_info_t *li, jl_tuple_t *sparams)
{
jl_tuple_t *spenv = NULL;
jl_value_t *ast = li->ast;
if (ast == NULL) return NULL;
JL_GC_PUSH2(&spenv, &ast);
spenv = jl_tuple_tvars_to_symbols(sparams);
if (!jl_is_expr(ast)) {
ast = jl_uncompress_ast(li, ast);
ast = dont_copy_ast(ast, sparams, 1);
}
else {
ast = copy_ast(ast, sparams, 1);
}
jl_module_t *last_m = jl_current_module;
JL_TRY {
jl_current_module = li->module;
eval_decl_types(jl_lam_vinfo((jl_expr_t*)ast), ast, spenv);
eval_decl_types(jl_lam_capt((jl_expr_t*)ast), ast, spenv);
}
JL_CATCH {
jl_current_module = last_m;
jl_rethrow();
}
jl_current_module = last_m;
JL_GC_POP();
return ast;
}
DLLEXPORT int jl_is_operator(char *sym) {
return fl_applyn(1, symbol_value(symbol("operator?")), symbol(sym))
== FL_T;
}
DLLEXPORT int jl_operator_precedence(char *sym) {
return numval(fl_applyn(1, symbol_value(symbol("operator-precedence")),
symbol(sym)));
}
jl_value_t* skip_meta(jl_array_t *body) {
jl_value_t *body1 = jl_cellref(body,0);
if (jl_is_expr(body1) && ((jl_expr_t*)body1)->head == meta_sym
&& jl_array_len(body) > 1)
body1 = jl_cellref(body,1);
return body1;
}
#ifdef __cplusplus
}
#endif